练30.2 错误减法

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	许菡唐	47ms	768 KiB	C++11	182 Bytes	2026-2-7 20:52:45
AC	junjie6666	47ms	780 KiB	C++11	194 Bytes	2026-2-7 20:45:26
AC	曹益通	49ms	516 KiB	C++11	165 Bytes	2026-2-8 19:17:49
AC	alex777	52ms	516 KiB	C++11	190 Bytes	2026-2-8 19:13:37
AC	gjh81	52ms	768 KiB	C++11	220 Bytes	2026-2-8 19:17:11